Dynamic Strain Evolution around a Crack Tip under Steady- and Overloaded-Fatigue Conditions
AbstractWe investigated the evolution of the strain fields around a fatigued crack tip between the steady- and overloaded-fatigue conditions using a nondestructive neutron diffraction technique. The two fatigued compact-tension specimens, with a different fatigue history but an identical applied stress intensity factor range, were used for the direct comparison of the crack tip stress/strain distributions during in situ loading. While strains behind the crack tip in the steady-fatigued specimen are irrelevant to increasing applied load, the strains behind the crack tip in the overloaded-fatigued specimen evolve significantly under loading, leading to a lower driving force of fatigue crack growth. The results reveal the overload retardation mechanism and the correlation between crack tip stress distribution and fatigue crack growth rate. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Lee, S.Y.; Huang, E.-W.; Woo, W.; Yoon, C.; Chae, H.; Yoon, S.-G. Dynamic Strain Evolution around a Crack Tip under Steady- and Overloaded-Fatigue Conditions. Metals 2015, 5, 2109-2118.
Lee SY, Huang E-W, Woo W, Yoon C, Chae H, Yoon S-G. Dynamic Strain Evolution around a Crack Tip under Steady- and Overloaded-Fatigue Conditions. Metals. 2015; 5(4):2109-2118.Chicago/Turabian Style
Lee, Soo Y.; Huang, E-Wen; Woo, Wanchuck; Yoon, Cheol; Chae, Hobyung; Yoon, Soon-Gil. 2015. "Dynamic Strain Evolution around a Crack Tip under Steady- and Overloaded-Fatigue Conditions." Metals 5, no. 4: 2109-2118.